She posted her a picture of her, Tamzin and their grandma, along with the caption 'Me and @glamzin and our Nonna Matriarch! In true #eastenders style... faaaaamly! Xxx FYI.., @glamzin is my cousin'.

Fans expressed their delight in the comments, with most saying they did not know about the connection.

A bit of digging has revealed that the pair are cousins by marriage rather than birth – Tamzin is the cousin of Holly's husband Dan Baldwin, and the actress discussed the connection in an interview with The Mirror in 2008, saying the pair were 'great friends'.